docstr: Create a new FileWriter.
  
  This must be called by the constructors of subclasses.
docstr_tok: ["Create","a","new","FileWriter",".","This","must","be","called","by","the","constructors","of","subclasses","."]
code: def __init__(self, codec="null"):
      """Create a new FileWriter.
  
      This must be called by the constructors of subclasses.
      """
      super().__init__()
      self._codec = codec
  
imports: import os
  import hashlib
  import json
  import numpy
  import tensorflow
  from avro.schema import Parse
  from avro.datafile import DataFileWriter
  from avro.io import DatumWriter
  from tests.test_atds_avro.utils.file_writer import FileWriter
  from tests.test_atds_avro.utils.generator.varlen_tensor_generator import VarLenTensorGeneratorBase
  from tensorflow_io.python.experimental.atds.features import DenseFeature, SparseFeature, VarlenFeature
label_desc: Use image node_id 1 to create a new ATDSWriter object from inherited base classes: FileWriter with example: obj = ATDSWriter(codec)